USS Percival (DD-452) was an experimental United States Navy destroyer who was never laid down and cancelled in 1946.

Percival and sistership Watson were planned to be a variation of the Fletcher-class destroyer, with Percival fitted with an experimental high-pressure boiler system and Watson designed to run on diesel engines, compared to the standard design of 4 oil-burning boilers.

Like her sistership, more pressing matters delayed their construction and were both canceled on 7 January 1946.

[2][5] After cancelation, her novel machinery was installed in USS Timmerman, a modified Gearing-class destroyer, for testing.

[6][7] This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.